Grigory was arrested on the night of August 10, 2020, as part of a criminal case opened due to protests and clashes between Pinsk residents and security forces on the night of August 9-10, 2020. He was convicted of participating in "mass riots." The victims in the case included 109 police officers and officials, who, in addition to prison sentences, demanded approximately 530,000 rubles in compensation from the defendants.
In February 2024, Grigory was transferred to prison regime.
He was released at the end of February 2026 .
